Regressions on trunk at revision 231282 vs revision 231219

[Bill Seurer]

New failures:
FAIL: gcc.dg/c99-vla-jump-1.c (test for excess errors)
FAIL: gcc.dg/format/attr-3.c    (test for excess errors)
FAIL: gcc.dg/format/attr-3.c    format_arg on union (test for errors, line 34)

New passes:
FAIL: gcc.dg/tree-ssa/pr45122.c execution test
FAIL: gcc.dg/vect/slp-multitypes-4.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/slp-multitypes-4.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vectorizing stmts using SLP" 1
FAIL: gcc.dg/vect/slp-multitypes-4.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/slp-multitypes-4.c scan-tree-dump-times vect "vectorizing stmts using SLP" 1
FAIL: gcc.dg/vect/slp-multitypes-5.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/slp-multitypes-5.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vectorizing stmts using SLP" 1
FAIL: gcc.dg/vect/slp-multitypes-5.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/vect/slp-multitypes-5.c scan-tree-dump-times vect "vectorizing stmts using SLP" 1
FAIL: gcc.dg/vect/vect-125.c -flto -ffat-lto-objects  scan-tree-dump vect "vectorized 1 loops"
FAIL: gcc.dg/vect/vect-125.c scan-tree-dump vect "vectorized 1 loops"